Sail with Japs from placencia. He's not going to cram you on a boat with a bunch of other tourists. You can have a private charter for a reasonable price. Sailing with Japs this summer was the best sailing trip ever! He provides all your needs and can cook up a delicious meal in no time. http://www.secretgardenplacencia.netfirms.com/sailing.htm
We did a day sail/snorkel trip with Japs from Placencia and it was WONDERFUL! We sailied to one of the nearby cayes and had a bar-b-que on the beach with some fish that he caught. The Cayes are absolutely beautiful and shouldn't be missed!